Like Araeosoma, Asthenosoma, Hapalosoma and Calveriosoma in having the pore-pairs arranged as three discrete series, but easily distinguished from those genera by its lack of membranous gaps between plates of the interambulacral series. Closest to Hygrosoma but in that genus the adoral accessory plates become adradial and the pore-pairs form a single series.
Smith, A.B. & Wright, C. W. 1990. British Cretaceous Echinoids. Part 2. Echinothurioida, Diadematoida and Stirodonta (1, Calycina). Palaeontographical Society Monographs 101-198, pls 33-72 (publication no. 583, part of Volume 143).
Woodward, S. P. 1863. On Echinothuria floris, a new and anomalous echinoderm from the Chalk of Kent. The Geologist 6, 327-330.